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## org.bouncycastle.crypto.digests
Class MD4Digest

    java.lang.Object
      org.bouncycastle.crypto.digests.GeneralDigest
          org.bouncycastle.crypto.digests.MD4Digest

All Implemented Interfaces:
  Digest, ExtendedDigest, Memoable

public class MD4Digest
extends GeneralDigest

implementation of MD4 as RFC 1320 by R. Rivest, MIT Laboratory for Computer Science and RSA Data Security, Inc.

NOTE: This algorithm is only included for backwards compatability with legacy applications, it's not secure, don't use it for anything new!

Field Summary

Fields inherited from class org.bouncycastle.crypto.digests.GeneralDigest
`purpose`

Constructor Summary
`MD4Digest()`
`MD4Digest(CryptoServicePurpose purpose)`
`MD4Digest(MD4Digest t)`

Method Summary
`Memoable` | `copy()` Produce a copy of this object with its configuration and in its current state.
`protected CryptoServiceProperties` | `cryptoServiceProperties()`
`int` | `doFinal(byte[] out, int outOff)` close the digest, producing the final digest value.
`java.lang.String` | `getAlgorithmName()` return the algorithm name
`int` | `getDigestSize()` return the size, in bytes, of the digest produced by this message digest.
`protected void` | `processBlock()`
`protected void` | `processLength(long bitLength)`
`protected void` | `processWord(byte[] in, int inOff)`
`void` | `reset()` reset the chaining variables to the IV values.
`void` | `reset(Memoable other)` Restore a copied object state into this object.

Methods inherited from class org.bouncycastle.crypto.digests.GeneralDigest
`copyIn, finish, getByteLength, populateState, update, update`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### MD4Digest

    public MD4Digest()

### MD4Digest

    public MD4Digest(CryptoServicePurpose purpose)

### MD4Digest

    public MD4Digest(MD4Digest t)

Method Detail

### getAlgorithmName

    public java.lang.String getAlgorithmName()

  Description copied from interface: `Digest`
  return the algorithm name

  Returns:
    the algorithm name

### getDigestSize

    public int getDigestSize()

  Description copied from interface: `Digest`
  return the size, in bytes, of the digest produced by this message digest.

  Returns:
    the size, in bytes, of the digest produced by this message digest.

### processWord

    protected void processWord(byte[] in,
                               int inOff)

  Specified by:
    `processWord` in class `GeneralDigest`

### processLength

    protected void processLength(long bitLength)

  Specified by:
    `processLength` in class `GeneralDigest`

### doFinal

    public int doFinal(byte[] out,
                       int outOff)

  Description copied from interface: `Digest`
  close the digest, producing the final digest value. The doFinal call leaves the digest reset.

  Parameters:
    `out` - the array the digest is to be copied into.
    `outOff` - the offset into the out array the digest is to start at.

### reset

    public void reset()

  reset the chaining variables to the IV values.

  Specified by:
    `reset` in interface `Digest`
  Overrides:
    `reset` in class `GeneralDigest`

### processBlock

    protected void processBlock()

  Specified by:
    `processBlock` in class `GeneralDigest`

### copy

    public Memoable copy()

  Description copied from interface: `Memoable`
  Produce a copy of this object with its configuration and in its current state.

  The returned object may be used simply to store the state, or may be used as a similar object starting from the copied state.

### reset

    public void reset(Memoable other)

  Description copied from interface: `Memoable`
  Restore a copied object state into this object.

  Implementations of this method should try to avoid or minimise memory allocation to perform the reset.

  Parameters:
    `other` - an object originally `copied` from an object of the same type as this instance.

### cryptoServiceProperties

    protected CryptoServiceProperties cryptoServiceProperties()

  Specified by:
    `cryptoServiceProperties` in class `GeneralDigest`

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